Several Medals in honor of William Rikatson Dykes are presented each year by the British Iris Society. These are the highest awards in their respective nations and continents. The American Dykes is for the best Iris bred by an American Hybridizer. And in the same way the Australian and New Zealand medals are for their respective hybridizers. The British Dykes Medal honors the best Iris from a hybridizer in Great Britain.
The following is a list of the New Zealand Dykes Medal winners;